Ventilating-window.



No. 69I,260. Patented lan. I4, |902.

Y E. A. GIESSER. l

VENTILATING WINDOW.

(Applieaeion med may 16, 1901.)

UNITED STATES PATENT OEEICE.

ERNEST A. GIESSER, OF BOSTON, MASSACHUSETTS.

VE'NTILATlNe-WINDOW.

SPEGIFICAEEON forming part of Letters Patent No, 691,260, dated January 14, 1902. Application filed May 16,1901. Serial No. 60,441. (N0 model.)

To a/ZZ whom, it may concern:

Be it known that I, ERNEST A. GIEssER, of Boston, in the county of Suiolk and State of Massachusetts, have invented certain new and useful Improvements inVentilating-VVindows, of which the following is a specification.

This invention has for its object to enable air to be admitted through the meeting-rails of two window-sashes by slightly moving one of the sashes from its closed position, the admission of y air being prevented when both sashes are fully closed.

The invention consists in the improvements which I will now proceed to describe and claim.

Of the accompanying drawings, Figure l represents a perspective view showing portions of two window-sashes embodying the invention and a portion of the casing in which they are contained Fig. 2 represents a vertical section showing the two sashes closed. Fig. 3 represents a view similar to F1'g. 2, showing the lower sash partly raised.

The same letters of reference indicate like parts or features in all the drawings wherever they occur.

On the drawings, a represents the meetingrail of the inner sash of a window, and?? represents the meeting-rail of the outer sash.

c c represent air-ducts extending transversely through the meeting-rail b from its outer to its inner side.

d d represent air-ducts extending through the meeting-rail a, the ducts d extending from the outer side of said rail to its upper side or edge, so that air flowing through said ducts will be delivered in a direction parallel with the plane of the inner sash and will not therefore move directly inward from the inner sash.

In the embodiment of my invention here shown the ducts dare angularly formed. The relative positions of the ducts c and d are such that when both sashes are closed, as shown in Figs. 1 and 2, the ducts will be disconnected, so that no air can pass through them, and when the inner sash is slightly displaced from its closed position, as shown in Fig. 3, the ducts are connected, so that air willv pass through them, as indicated by arrows.

The bead or strip f of the window-casing, which abuts against the lower rail a of the inner sash, is of such height that it overlaps the rail a' when the ducts Vc and d are connected, as shown in Fig. 3, so that it constitutes an air-guard which prevents the admisusion of air between the rail a and the end of the casing,against which it abuts when closed. It will be seen that the described improvenient provides means whereby air may be admitted for the purpose of ventilation by slightly movingone of the sashes from its closed position, the admission of air being confined to the region of the meeting-rails a, and b and prevented when the sashes are closed. The described improvement may be applied to any window the meeting-rails of which have suiicient width to enable the ducts c and d to be formed therein.

Itis obvious that my invention may be applied to windows in which the sashes slide horizontally as Well as to those in which the sashes slide vertically.

1. A Ventilating-window comprising an inner and an outer sash relatively movable in parallel planes and having air-ducts in their meeting-rails, the ducts of the inner sash being out of connection with the ducts of the outer sash when both sashes are closed, and adapted to be brought into connection with the ducts of the outer sash by a movement of the inner sash.

2. A Ventilating-window comprising an inner and an outer sash relatively movable in parallel planes, the meeting-rail of the outer sash having transverse air-ducts extending from its outer to its inner side while the meeting-rail of the inner sash has air-ducts eX- tending from its outer to its upper side, the ducts of the inner sash being out of connection with the ducts of the outer sash when both sashes are closed, and adapted to be brought into connection with the ducts of the outer sash by a movement of the inner sash.

3. A Ventilating-window comprising an inner and an outer sash relatively movable in parallel planes and having air-ducts in their IOO meeting-rails, the ducts of the inner sash beof air when the inner sash is in position to ing out of connection with the ducts of the Connect the two series of duets.` 1o outer sash when both sashes are closed, and In testimony whereof I have affixed my sigadapted to be brought into connection with nature in presence of two Witnesses. 5 the ducts ofthe outer sash by a movement ERNEST A. GIESSER.

of the inner sash, and a casing having a, guard Witnesses: member which overlaps the end rail of the C. F. BROWN, inner sash sufficiently to prevent the entrance E. BATCHELDER. 

